From 74ddf10c4607cb23279cc550e0ee41d2827da38c Mon Sep 17 00:00:00 2001
From: caoyuan <cao.yuan@99cloud.net>
Date: Wed, 20 Dec 2017 22:55:36 +0800
Subject: [PATCH] Add the gnocchi_backend_storage configuration for external
 ceph docs

when use external ceph, kolla need set ceph to "no",this way by default, the
gnocchi_backend_storage will be file, refer to [0]. we should set
it to ceph, this patch to explain in docs.

[0] https://github.com/openstack/kolla-ansible/blob/master/etc/kolla/globals.yml#L302

Change-Id: If35082531e9de4524299fe4fc7e97bec5a6c2c79
---
 doc/source/reference/external-ceph-guide.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/source/reference/external-ceph-guide.rst b/doc/source/reference/external-ceph-guide.rst
index 1e873a1549..e9dc6393cc 100644
--- a/doc/source/reference/external-ceph-guide.rst
+++ b/doc/source/reference/external-ceph-guide.rst
@@ -14,7 +14,7 @@ Requirements
 * An existing installation of Ceph
 * Existing Ceph storage pools
 * Existing credentials in Ceph for OpenStack services to connect to Ceph
-  (Glance, Cinder, Nova)
+  (Glance, Cinder, Nova, Gnocchi)
 
 Enabling External Ceph
 ======================
@@ -36,6 +36,7 @@ service in ``/etc/kolla/globals.yml``:
   glance_backend_ceph: "yes"
   cinder_backend_ceph: "yes"
   nova_backend_ceph: "yes"
+  gnocchi_backend_storage: "ceph"
 
 The combination of ``enable_ceph: "no"`` and ``<service>_backend_ceph: "yes"``
 triggers the activation of external ceph mechanism in Kolla.